No...as I mentioned in comment #33, "sudo hdparm -B 255 /dev/sdb1" ran
after HDD woke up. But maybe I misunderstand, if you meant that after
execute that command is the HDD still can go into sleep state?; my
answer is: YES (in about 5-7 minutes then HDD entered sleep state).

And then I executed "sudo hdparm -B 254 /dev/sdb1" while bug reoccured,
the result was:

/dev/sdb1:
 setting Advanced Power Management level to 0xfe (254)
 HDIO_DRIVE_CMD failed: Invalid argument
 APM_level      = 254

After previous command, same behavior reoccured (looks like that command
has no effect).

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

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https://bugs.launchpad.net/bugs/1222313

Title:
  0bc2:2300 [HP Pavillion dm3-1109TU] External HDD goes into low power
  mode delaying saving by 10-20 seconds

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